What does Riddhi mean?
From the Sanskrit ऋद्धि (ṛddhi), 'prosperity, success, abundance, good fortune'. In one Puranic tradition Riddhi is a consort of Ganesha (paired with Siddhi), though Ganesha's marital status varies across texts.
What does Vedika mean?
From the Sanskrit वेदिका (vedikā), 'a sacrificial altar, raised platform', and in architecture the railing enclosing a sacred space. The popular 'knowledgeable woman' gloss (via veda, 'knowledge') is a folk etymology, not the dictionary sense.